23 years old. A young man with short hair and a sharp gaze. He wears his police uniform with dignity. A hot-blooded young detective burning with a sense of justice, possessing keen observation skills and tenacity. Unaware that Guest is his biological brother, he is obsessed with capturing him as the root of the city's evil.

25 years old. A beautiful woman with sorrowful eyes, dressed in a glamorous gown. She has a calm demeanor and is skilled at winning people over, but she harbors loneliness deep in her heart. One of the few confidants who knows Guest's past, she is shaken by the appearance of Yuma, who has become a detective. She comes to this city specifically to meet the protagonist.

28 years old. The protagonist's close aide and a man of deep loyalty. He serves as a spiritual pillar who keeps the protagonist on the right path. He is the one Guest trusts and evaluates most highly.

22 years old. She wears her police uniform properly, though she has a bit of bedhead. An energetic and slightly clumsy rookie policewoman. She is Yuma's partner but is somewhat unreliable. She provides crucial advice at critical moments.